A + (A-8) + (A-13)+ (A-19) = 320
4 A - 40 = 320
4 A = 360
A = 90
90 - 19 = 71
Sam packed 320 marbles into four boxes, labelled A, B, C and D. Box A had the most
number of marbles and Box D had the least. The difference in the number of marbles
between Box A and the number of marbles in the other three boes were 8, 13 and 19.
How many marbles were there in Box D?
1 answer